We have a website https://trai.gov.in, we want to remove twittercards from our website for now, We removed it, still card is showing from few handles. Through twitter card validator we are getting response as mentioned in subject line.

if you see a validator message about Fetching the page failed because other errors or similar, check your SSL configuration. The certificate and server name must match (or be aliased to match) due to Java security constraints.

I’ve checked and this is indeed the issue here, the SSL configuration is not fully valid. There’s an incomplete certificate chain and other issues.